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void isConnected (Graph graph, int curCity, int secondCity, int curDepth){

   if ((curCity == secondCity) ||
	(graph[curCity].firstRoadLink->city == secondCity)){
	   printf("They are connected !\n");
	}else{

           Link curLink = graph[curCity].firstRoadLink;
	      if (curLink != NULL){
	         while (curLink->nextCitybyRoad != NULL){
                    curLink = curLink->nextCitybyRoad;
                    printf("curDepth = %d\n", curDepth);
	            isConnected(graph, curLink->city, secondCity, ++curDepth);
		 }
	      }
	}
}